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Determine if data type is variable-length string


output = H5T.is_variable_str(type_id)


output = H5T.is_variable_str(type_id) returns a positive value if the data type specified by type_id is a variable-length string and zero if it is not. A negative value indicates failure.


fid ='example.h5');
dset_id =,'/g3/VLstring2D');
type_id = H5D.get_type(dset_id);
if H5T.is_variable_str(type_id) > 0
    fprintf('variable length string\n');